Ramot University Authority for Applied Research and Industrial

P & D Medical Coatings, Inc.

Other

Ramot University Authority for Applied Research and Industrial Development Limited

Raymond L Boxman

Hanan Yaloz

Samuel Goldsmith

Menachem Nathan

Kambiz Pourrezaei

Richard B Beard

Mark DeLaurentis

Larisa Kaplan

Amir Ben-Shalom

Naum Parkansky

Michael Keidar

Hanan Rosenthal

Shmuel Goldsmith

Isak I Beilis

Irina Shvets

Shaul Shalev

Nissan Brosh

A process and apparatus for depositing thin films and coatings using a vacuum arc plasma source having hot, non-consumable anode is described. Plasma and macroparticles of the cathode material are emitted from the cathode. Part of this material arrives at the hot refractory anode, where it is re-evaporated without macroparticle generation. Substrates exposed to the vapor flow from the anode, but shielded from a direct line of sight with the cathode, are coated with cathode material without macroparticle inclusions.

Deposition of coatings and thin films using a vacuum arc with a non-consumable hot anode

The present invention pertains to a method of controlling the microstructure and service properties of electrically conductive transparent and other materials by passing an electrical current through the materials while simultaneously employing an additional process. Examples of the additional process include heating, sintering, deposition, casting, electrical arcing, and immersion in liquids. In one embodiment of the present invention, the additional process is deposition of a transparent conductive coating material while passing a current through the deposited coating along the surface of the coated material.

Method of producing transparent and other electrically conductive

Catheters and other medical devices include plural layers of metals applied to the outer surfaces, which tend to close minuscule cracks through which corrosion may attack the underlying support. In some avatars, the initial layer of material is preferably silver, applied following specific preparation steps. In other embodiments, succeeding layers of metal completely cover the initial layer, and are also of silver. The succeeding layers are deposited after deposition of the prior layer, and tend to reduce the incidence of microscopic pores or cracks and are less prone to delamination. The succeeding layers are preferably of mutually different metals between layers. In a particular avatar, in which the exposed metals are oligodynamic silver and more noble platinum, the exposed silver layer lies over a portion of the platinum layer, to thereby prevent corrosion of the silver layer from disconnecting portions of the silver layer. Fabrication methods include deposition of successive layers by means of sputtering in a longitudinal array of cylindrical magnetron sections, in which each section applies one layer of the coating over the coating applied by the preceding section. The magnetron sections may be energized and deenergized in a temporal pattern associated with the progress of the workpiece material through the array, to thereby cover or expose particular longitudinal layers. In some embodiments, a first layer of electrically conductive material is deposited by electroless methods particularly in the lumen, following which additional layers may be applied by conventional electrolytic deposition. An electroless method according to the invention includes preparation steps which may include ultrasonically cleaning the surface with a solution of isopropyl alcohol, then drying the surface with a stream of dry gas, and etching the surface with a solution of sodium naphthalene in diethylene glycol dimethyl ether.

Method for fabrication of metallized medical devices

A urinary catheter and system includes a catheter with a drain lumen which is coated with oligodynamic metal and preferably arranged with a coating of a more noble metal for creating an iontophoretic galvanic couple, which drives antimicrobial ions into solution. The exterior of the catheter is also coated in a similar manner to inhibit microbes migrating toward the bladder along the outer surface of the catheter. The system includes a flow rate control device which may be a one-way valve, a filter or both. A collection bag is coupled to the control device. The interconnecting hoses, the flow rate control device(s) and the collection bag are also coated on the interior with oligodynamic metal, preferably silver, and also with a more noble metal, preferably platinum.

Urinary catheter and system

A method of surface-treating a workpiece is described characterized in aping one or more short-duration electrical pulses to produce, for each pulse, a high amplitude short-duration electrical discharge between the workpiece, serving as an anode, and another material serving as a cathode, while the workpiece and cathode are in a vacuum ambient. The workpiece and cathode are spaced from each other by a gap which is less than the smallest dimension of the cathode in the plane therethrough parallel to the workpiece.

Method and apparatus for surface-treating workpieces

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Herzliya, Israel

Raymond L Boxman